Flight Guangzhou Baiyun International Airport departs from Guangzhou Guangzhou Baiyun International Airport at 08:25 and arrives at Jakarta Soekarno–Hatta International Airport at 12:35.
The flighttime is about 5h 10m. The distance travelled ("as the bird flies"): 1322 Km. So the average speed is roughly 256 Km.
There is an 1 hour time difference between Guangzhou and Jakarta